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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1489136	Semgroup Corp	SEMG	Oil & Gas Field Services, Nec (1389)	203533152

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
872786	Paribas Bnp	787 Seventh Avenue, 30Th Floor New York NY 10019		No	No	No	Yes

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Class A Common Stock, Par Value $0.01 Per Share	Disposition	2011-06-28	70,000	$26.43	4,155,619	No	4	S	Indirect	By Subsidiary
Class A Common Stock, Par Value $0.01 Per Share	Disposition	2011-06-29	25,916	$26.36	4,129,703	No	4	S	Indirect	By Subsidiary

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By Subsidiary
No	4	S	Indirect	By Subsidiary

Footnotes

This Form 4 is being filed by BNP Paribas, a French societe anonyme and bank holding company under the Bank Holding Company Act of 1956, on behalf of its wholly owned subsidiaries.
4,155,619 shares of Class A Common Stock, par value $0.01 per share ("Common Stock") are directly held by BNP Paribas VPG SemGroup, LLC, a direct wholly owned subsidiary of BNP Paribas VPG Master, LLC, which is a direct wholly owned subsidiary of BNP Paribas.
4,129,703 shares of Common Stock are directly held by BNP Paribas VPG SemGroup, LLC, a direct wholly owned subsidiary of BNP Paribas VPG Master, LLC, which is a direct wholly owned subsidiary of BNP Paribas.